HMI fixture at 575W — compact daylight source ideal for interview setups and small productions.
Technical Details
The Compact 575 operates with a 575W Osram HMI discharge lamp at a 5600K color temperature, achieving an illuminance of 2,500 lux at 3 meters. The electronic ballast (EVG) weighs between 8-12 kg and operates flicker-free from 25 fps. The Fresnel reflector allows focusing between 15° (spot) and 60° (flood). Typical models include the Arri Compact 575, K5600 Joker-Bug 575, or the Dedolight DLHM4-575. The operating voltage is 90-250V AC, with a temporary inrush current of up to 8 amperes.
History & Development
In 1987, Arri introduced the first Compact 575 in response to the demand for portable HMI units. K5600 followed in 1989 with the Joker system, which introduced modular components and battery operation for the first time. In the 1990s, these lights became the standard for documentaries and smaller feature film productions. From 2010 onwards, LED systems like the Arri SkyPanel S30-C began to partially replace the 575W HMIs, although HMI continues to be preferred for maximum light output.
Practical Use in Film
Thomas Vinterberg used the Compact 575 as the main light source for interior shots in "The Celebration" (1998) to simulate natural daylight through windows. In "28 Days Later" (2002), Anthony Dod Mantle used battery-powered 575s for chase scenes in London. It is typically used as a key light for interviews, as fill light for exterior shots, or bounced off white ceilings for soft room light. The low power consumption allows operation from 16A house connections, while the compact design enables gimbal and Steadicam lighting.
Comparison & Alternatives
Compared to 1200W or 2500W HMIs, the 575 offers significantly less light output but a third of the fixture weight. LED panels like the SkyPanel S60-C achieve similar light levels with continuous dimming but at a higher initial cost. Tungsten alternatives like 2kW Redheads produce comparable illuminance but require color conversion and more power. Modern battery systems now allow for 4-6 hours of operation, making the Compact 575 still relevant for off-grid shoots.